Which version is BOOTX64.efi?

Folks,

  I am feeling increasing pain from finding EFI partitions floating
around and containing spurious binaries in /EFI/BOOT/BOOTX64.efi,
where there seems to be no means whatsoever for figuring out what
these binaries do/are at all, or which version of it they would be
and what they can support.

Currently I am in the process of migrating from R.13 to R.14, and
strangely the loader is now in the process of shrinking (from 862720
to 662528), so even "the larger the newer" won't hold.

Question: is there any concept to get some proper version information
into these binaries, from which then some identity and the commit tag
could be retrieved from which they were created?

regards,
PMc